Grindstone attachment.



PATENTED JUNE 2, 1908. .m. J. MURPHY.

GR INDSTONEY ATTACHMENT.

APPLICATION FILED MAIL-7, 1908.

2 SHEETS-SHEET 1 Lacv 6] Hozuu o ruemmms zrsns CO.,'WASHINGTON, n. c.

' THOMASjJfiMURPHYiOF NEWEBEDFORD, MASSACHUSETTS.

GRINDSTONEZATTAGHMENT.

Specification of Letters Patent.

- Patented June 2, 1908.

Application filed March 7 1908. Serial No. 419,712.

To all whom it may concern:

Be it known that I, THOMAS J. MURPHY, a citizen of the United States,and resident of New Bedford, Bristol county, State of Massachusetts,have invented certain new and useful Improvements in GrindstoneAttachments, of which the following is aspecification.

The object of the invention is to provide means for connecting agrindstone to the casing or frame of a machine having a rotary shaft,and driving thesame with the power devices of such machine.

The invention is particularly adapted to machines having knives whichrequire frequent sharpenin such as meat cutting machines, and it wil bedescribed in connection with a machine of this class.

In the accompanying drawing, Figure 1 is a side elevation of anattachment constructed in accordance with the present invention showingthe same in position for use; Fig. 2

is a longitudinal sectional view through the machine; Fig. 3 is anelevation on the line AA of Fig. 2; Fig. 4 is a detail view of theremovable shaft bearing and hanger for the liquid receptacle.

Referring to the drawings, 1 designates the casing of a meat cutting orgrinding machine of that class or type in which the meat is fedlongitudinally through a cylindrical body and cut by knives mounted on ashaft j ournaled in bearings in the opposite ends of the casing. In theparticular machine illustrated the cylinder or casing 1 is carried by aframe 2 supported from the casing 3 of an electric motor. The armatureshaft 4; of the motor carries a pinion 5 which, through an intermediategear 6, journaled in bearings in the frame 2, transmits movement to thedriving gear 7 with which the cutter carrying shaft of the machine isadapted to be detachably connected.

To apply the attachment constituting the present invention, theperforated cap, which closes the discharge end of the casing 1, as wellas the cutting blades and their supporting shaft, are removed and ashaft bearing 8 is securely fastened to the discharge end of the casing.As shown this bearing 8 has at its inner end a disk-like flange 9 whichis surrounded by a collar 10 having an internally threaded portionengaging threads on the casing 1, whereby the flange 9 may be held inclose-contact with the end of the casing. The shaft fall supporting thegrindstone 12 is mounted in the bearing Sand in the bearings provided atthe opposite end of the casing 1 for supporting the Shaft of thegrinding knives. The shaft 11 is provided with means whereby it will befirmly connected with the gear 7 when properly inserted in its bearings.For instance, said shaft may be made polygonal in cross-section atthatpart which receives the gear 7.

In using the rindstone it is of course desirable to apply iquid to theperiphery thereof and for this purpose the lower portion of the stone iscaused to travel through a trough-like receptacle 18 which is supportedin such manner that it may be adjusted vertically. As shown a hanger 14has at its upper end an eye surrounding the shaft bearing 8 and isadapted to be held fast on said bearing by a thumb screw 15. In thelower portion of the hanger is formed a longitudinally extending slot 16through which extends a bolt 17 attached to one wall of the receptacle13 and provided at its outer end with a win ed nut 18. To provide a morefirm and stab e support for the liquid receptacle a leg or standard 19is preferably employed, the upper portion of said leg having therein alongitudinal slot 20 through which the bolt 17 extends. The lower end ofthe leg 19 ,is expanded to form a base or foot 21 which rests upon thecounter or other support on which the motor 3-is arranged.

It will be seen that by the means described the shaft 11 of thegrindstone can be readily substituted for the knife supporting shaft ofthe grinding machine and connected with the power devices of suchmachine to be rotated thereby. By disengaging the collar 10 from thecasing 1 the shaft 11 can be withdrawn from the casing and the parts ofthe machine which have been removed readily restored. The hanger 14 andleg 19' also serve to provide a firm support for the shaft bearing 8, as

scribed, of a shaft bearing detachably Supported at one end of thecasing, a grindstone, a shaft supporting the grindstone and journaled insaid bearing, a hanger supported by said bearing, and a verticallyadjustable liquid receptacle connected with said hanger and into whichthe lower portion of thegrindand j ournaled in said stone extends.

2. The combination With the casing and power devices of a machine of theclass described, of a shaft bearing detachably supported at thedischarge end of the casing, a grindstone, a shaft supporting thegrindstone and journaled in said bearing and in the bearing at theopposite end of the casing, and connected with the power devices of themachine to be rotated thereby, a hanger depend ing from the shaftbearing at the dischar e end of the casing, and a support adjustab yconnected with said hanger.

3. The combination with the casing and power devices of a machine of theclass de-. scribed, of a shaft bearing detachably supported by thedischarge end of the casing, a grindstone, a shaft su porting thegrindstone bearing and in the bearing at the opposite end of the casing,and connected with the power devices of the machine to be rotatedthereby, a hanger connectedwith the shaft bearing at the dischar e endof the casing and having a longitudinal y extending slot formed in itsbody, a liquid receptacle adapted to receive the lower portion of thegrindstone, and a bolt extending from said receptacle through the slotin the hanger and adapted to be secured at any desired position in saidslot.

4. The combination with the casing and power devices of a machine of theclass described, of a shaft bearing detachably supported by thedischarge end of the casing, a grindstone, a shaft su porting thegrindstone and journaled in said earing and in the bearing at the oposite end of the casing, and connected with the power devices of themachine to be rotated thereby, a liquid receptacle adapted to receivethe lower portion of the grindstone, and a longitudinally extensiblesupport, one member of which is connected with the shaft bearing at thedischarge end of the machine casing.

5. The combination with the casing and power devices of a machine of theclass described, of a shaft bearing having a disk-like flange at oneend, a sleeve surrounding the bearing and engaging the machine casing tohold the bearing against the discharge end of the casing, a grindstone,a shaft su porting the grindstone and mounted in said earing, and aliquid receptacle into which the lower portion of the grindstoneextends.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS J MURPHY. Witnesses J. P. DORAN, EUGENE H. SULLIVAN, Jr.

